Behaviour of concrete-filled steel tubes with concrete imperfection under axial tension
| Autor: | Yong Ye, Wei Li, Zi-Xiong Guo, Xiao-Juan Liu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Tension (physics) 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Finite element method 0201 civil engineering Core (optical fiber) 021105 building & construction Steel tube General Materials Science Composite material Civil and Structural Engineering |
| Zdroj: | Magazine of Concrete Research. 73:743-756 |
| ISSN: | 1751-763X 0024-9831 |
| Popis: | In concrete-filled steel tubes (CFSTs), a gap between the steel tube and the core concrete can exist due to inappropriate construction, which will result in a change in the load-carrying capacity of the member. To assess the change in tensile strength, the tensile behaviour of circular CFST members with small gaps was investigated. To this end, a finite-element model was established and validated. Two types of gaps were considered in the analysis – a circular-segment gap and a circumferential gap. The full-range mechanical behaviour of CFST tensile members with a gap was evaluated. CFST members with and without a gap were compared in terms of their failure pattern, load–deformation response, composite action and ultimate strength. A parametric study was also performed and simplified formulae for calculating the tensile strength of CFST members with gaps were developed. It was found that the tensile strength of a CFST member with a gap decreases due to reduced composite action. The tensile strength of CFST members with gaps can be assessed reasonably well using the proposed method. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|